I suggest you ...

Allow importation

I'd like to use GTDNext, but I already have GTD up and running in another webapp (workflowy, in my case). The thought of retyping all of my items into GTDNext is keeping me from making the transition.

Allowing us to import plain text or csv lists to create a whole batch of items would be really helpful. I imagine that I'm not alone in wanting to transition from some other program. I'd guess too that most programs have some kind of plain text or csv output that could be used in this.

I agree 100%. Need to import tasks in simple CSV, text, or even just "bulk add" and then be able to move them around where needed. Like the functionality in Toodledo. This is the ONLY thing preventing me from using GTDNext 100%